Go Back   Aquarium Advice - Aquarium Forum Community > Saltwater and Reef > Saltwater Fish Only & FOWLR
Click Here to Login

Join Aquarium Advice Today
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
Old 11-21-2009, 05:44 AM   #1
Aquarium Advice Apprentice
Join Date: Nov 2009
Location: Singapore
Posts: 15
Is there something wrong???

Hi,i am currently using dymax glass hydrometer which is a hydrometer which bobs in the water. When i did a partial water change 2 days ago,i checked the salinity level and it was fine but when i checked it today,the salinity level has dropped! I don't know whats wrong because i had placed a marker to indicate my water level when i did the pwc and the water level currently is below that marker so the salinity should be higher but mine is dropping. Is there something wrong with my hydrometer or what???

DeadOrAlive is offline   Reply With Quote
Old 11-21-2009, 07:58 AM   #2
Community Admin
melosu58's Avatar

Tank of the Month Award
Join Date: Oct 2004
Location: Virginia
Posts: 38,340
Hydrometers are so unreliable. Get a refractometer.

Saltwater Aquarium Salinity & Specific Gravity Testing: Portable Refractometer



You can view many of my fish and corals in my photo albums in my profile.

View my tank

AA Community Rules|AA TOS

Forums 101 - posting, accounts, basics
melosu58 is offline   Reply With Quote
Old 11-23-2009, 12:28 AM   #3
Aquarium Advice Addict
Join Date: Aug 2006
Location: not here anymore
Posts: 5,338
Actually... the floating glass hydrometers are pretty darn good, assuming you compensate for the temperature using the little chart that comes with them.

Did you check the salinity of the partial water change water before you added it to the tank? Was it the same as the tank? If you took the reading immediately after the water change, perhaps the new water hadn't had time to mix with the old yet? And your new water was lower in salinity than your tank?

How much of a drop are we talking about?
Kurt_Nelson is offline   Reply With Quote

Please support our sponsors and let them know you heard about them on AquariumAdvice.com

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
What am I doing wrong? yohann976 Freshwater & Brackish - Unhealthy Fish 8 08-12-2008 12:45 AM
SO WRONG..!!! ....? EdgarMedina1010 Freshwater & Brackish - General Discussion 5 06-18-2006 08:59 PM
What am i doing wrong? Joey17 Freshwater & Brackish - Unhealthy Fish 8 09-10-2005 03:41 PM
ok, what am I doing wrong? Meredith Forum Admin & Announcements 8 01-09-2005 03:19 PM
Did I do something wrong rdefino Saltwater & Reef - Getting Started 3 10-31-2004 11:07 PM

» Photo Contest Winners

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 01:51 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.